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Prospective evaluation of accuracy of liver biopsy findings in the identification of chemotherapy-associated liver injuries.

Archives of Surgery 2012 December
OBJECTIVE To evaluate the accuracy of liver biopsy findings in preoperative assessment of chemotherapy-associated liver injuries (CALIs). DESIGN Prospective study. SETTING Tertiary care referral hospital. PATIENTS From July 1, 2007, to January 31, 2011, all patients with colorectal metastases receiving preoperative oxaliplatin- and/or irinotecan-based chemotherapy (≥4 cycles) were considered for the present study. Patients underwent parenchymal biopsy before liver resection. Blinded CALI evaluation was performed on biopsy and resection specimens. INTERVENTION Liver resection. MAIN OUTCOME MEASURES Sensitivity, specificity, and accuracy of liver biopsy in CALI evaluation. RESULTS We included 100 patients. At specimen analysis, grade 2 or 3 steatosis was diagnosed in 30 patients; grade 2 or 3 sinusoidal dilatation, in 28; grade 2 hepatocellular ballooning, in 3; grade 2 or 3 lobular inflammation, in 25; and steatohepatitis in 19. Obesity was associated with grade 3 steatosis (20.8% vs 5.3%; odds ratio [OR], 4.74 [P = .03]) and steatohepatitis (33.3% vs 14.5%; OR, 2.96 [P = .04]). Oxaliplatin administration was associated with higher sinusoidal dilatation grade (P = .049). Mortality (2 cases) was increased among patients with steatohepatitis (10.5% vs 0; OR, 13.67 [P = .04]). Biopsy findings correctly predicted steatosis (sensitivity, 88.9%; accuracy, 93.0%) but had low sensitivity and accuracy for sinusoidal dilatation (21.4% and 63.0%, respectively), hepatocellular ballooning (16.0% and 69.0%, respectively), lobular inflammation (20.0% and 78.0%, respectively), and steatohepatitis (21.1% and 79.0%, respectively). Biopsy accuracy did not improve regarding specific chemotherapy regimens or prolonged treatments. CONCLUSIONS Liver biopsy cannot be considered a reliable tool in assessing CALIs except for steatosis. The procedure should not be recommended during preoperative workup.

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